Comedian Norm Macdonald is joining the book game. The long working comedian announced on Twitter today that his memoir, Based on a True Story, will hit the shelves on Tuesday, September 20th. The book’s description is self described as “Wild, dangerous, and flat-out unbelievable.” It starts with his humble farm beginnings and goes all the way to SNL and beyond. Also, the book promises that we’ll finally get to the bottom of those “long mythologized Hollywood stories.” You can preorder the book now at Amazon. There’s also an audio CD version that is sure to have Macdonald reading it so choose book or audio wisely.